Recall that the Hecke operators \(T(m)\) , \(m\in \mathbb {N}\) , are a set of commuting operators whose action on the modular
form \(f(z)=\sum a(n) e^{2\pi i nz}\)  is to return the coefficients in the \(q\) -expansion as eigenvalues
[1]}, [2]}, [3]}, [4]}, [5]}
\(T(m) f(z) = a(m) f(z) \) 
